Hydraulic control apparatus for scrapers



Feb. 16, 193.2v

MCLENNEN C. SLATE HYDRULIC CONTROL APPARATUS FOR SCRAPERS Original FiledOct. 10, 1929 B'Sheets-Sheet l ma .N1

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Feb. 16, 1932 MCLENNEN c. sLATE HYDRAULIC CONTROL APPARATUS FOR SCRAPERSoriginal Filed Oct. 10, 1929 3 Sheets-Sheet 2 SE? E NQN N Nunn.

Feb. 16, 1932. QMCLENNEN c. SLATE AHYDRAULIC CONTROL-APPARATUS FORSCRAPERS m mw@ Q m V [L w AQ original Filed ojt. .10, 1929 hereinafterdescribed.

fifi' with the piece 3'* Fig. 4 is aytopplan viewof the hydraulicPatented Feb. 16, 1932 Mc'lniinnn c. sLA'rE, or ALBANigoREGoN, nssieuonsLA'rn oonsrnuorioiv -ooM- y PANY, or ALBANY, OREGON 1 f HYDRAULICooNrrRoL APPARA'rus Fon sGRAERs Application fried october io, i929,serial rlie object of my invention is to provide af novel hydrauliccontrol apparatus for controliing the operation of a scraperandparticularly to positively and automatically con'-l f trol the diggingangle of theV scraper and for permitting of such control from a distanceas from the seat of the tractor', by means of cords connected withlevers arranged to operate valves or other mechanism ofA the hy-ldraulic apparatus; and it is an object of my invention to provide anovel combination of elements and the novel means for arranging7Vmounting and adjusting the mechanismdisclosed in the accompanyingVdra-wings and I attain these and other objects of my in'` vention bythe apparatus illustrated inthe accompanying drawings,in which, Y Figure1 is a side elevation of my' invention p 14' held in a forward position,

thus causing a tilting of the body of the scraper and the placing of itsentire weight upon its cutting blade; 1 Fig. 2 is a side elevation'ofthe scraper i" in dumping'position and the relative position of thecontrol apparatus when it is in position;

that

Fig. 3' is a side elevation of the scraper in Opening out'of thecylinder 22 is a conduit 28 A normal position for haulingy controlapparatus; and 4 Fig.

5 is a side elevation anism broken away and'shown in vertical sec- Lilrenumerals of the several views. y n Referring' to the accompanyingdrawings I provide a suitable scraper body 1` having run-p` ners 2 and abottoinand. cutting blade 3. I

provide a tongue for the scraper -witha..re

leasable slide member 7 slidabl yrnou'ntedon` the underside of thetongue and to. which the ends (tot a plurality of pulling rods 5 areloosely mounted, the rearends-t of said pull-f y with the trip lever 10"and may be released so t as to slide on the tongue` byoper'ating that.

y of the hydraulic` control apparatus with portions ofthe incoh-4vdesignateli-ke partsy in eachJ no. 398385. Renew'ediapary 14, i931.

theV operator.4 I provide an extension orlinlr 9 on the end of `tongue8, as shown in Fig. `1. Mounted on the tongue 8 is a bracket 12 onwhich; the hydraulic control'apparatus is mounted by means ofthe pivotconnectionl?) as shown in Figs. 1 and 3.

y Ailixed to the rear of the er 'are spaced posts 14 which arelconnected by the pin or'bolt 15 which extends through the slot 17 intherear -end of the tongue 8. The

body of the scrapi upperends of the post 14 are provided with iapertures `inwhich thefprojections 16 of the movable piece 2Q aremounted.r4 Thepiece 20 has a bolt-20a extendingvertically through it andthr'oi'igh 'the slots 20o of members 18,

this element functioning toV keep they movable piece in itsproperslidable relation-'in the slot 19 between the spa-ced plates 18. i

Referring to'Figs;V 1l and 5' there `is illustrated mjy hydraulicapparatus consisting of the cylindersj21 and 22 containing oil or othersuitable liquid. VIn the: cylinder 22 is mounte ed* a piston 25 Ywhichis connected by a suitable connecting rod 26 with the spaced arallelplates 18, the connecting rod 26 being s idably mounted in a casing 27as' shown in Fig. 5.

at the rear end of the cylinder which conduit circles' the cylinder andwhich also is in coininunication with the forwardv end of cylinder 22throughithe conduit 33. I provide a check valve'l in pipe 29 and a pipecross connection 32, as shown in Fig. 4 ;-and a relief valvev 23 whichisequipped with a check valve `24g as shown indottedlines in Fig. Ll.' Iprovide a communicates with the pipel 29 which' en-A relief port 3&1ylconr'iecting cylinderv 22 with 'v 'cylinder 2 1as shown ,in Fig. .5,whichv perff mits the 1c`ylinder'21 to compensate for the spacey oc-V attheorward'endof,cylinder 22.. f Y Va'hn'23l's controlled by a lever 24which turn'V is operated 'tends to a convenient position within reachoi" the" operator von'l theitractoi' drivers seat. In` operationas,theyscraper is dumped, posts 121.automaticallyfI assume the-position y .90*liquidy to llow fromcylinder22 to y cupied b connecting rod 26 whenpiston 25 is s by a rope 25 which-eX-f y relative to the tongue 8, asshown in F ig. 2. At the same time, this action causes oil that is onthe forward side of the piston 25 to pass to the rear of said piston,the oil first passing through conduit' into pipe 29,' past check valve81 and through conduit 28 to the rear of piston 25. Fig; 5 shows apiston in the position in whichit stands when the scraper is in itsnormal hauling position. l/Vhen the scraper is in the position shown inFig. 2, the piston 25 will be moved to the forward end of the cylinder22. Now if the scraper body 1 is returned to a digging po- Y sition,such kas that shownin Fig. 1, the piston cannot return to the rear endof the cylinder because of entrapped oil in rear portion yof thecylinder 22. A. small portion of oil must pass througha relief port 34,Vcommunieating between cylinder 22 and reservoir 21, as shown in Fig. 5,because when the piston is in the forward end of cylinder 22, connectingrod 26 occupies an appreciable amount of the volume inside the cylinder.f l

AfterY the scraper yhas been filled with earth. by-pass valve 23 isoperated bya pull on the rope 25. which actuates the lever 24, which inturn operates the valve 23. The piston will then moveto the rear end ofthe cyl- The by-pass adjustment cocks 49, 50, 51 and sitions by useofcord/25.V A

inder and the oil that was previously entrapped behind the piston willpass through the by-pass valve 23, through pipe 29 to the forward end ofcylinder 22 andenou gh oil to compensate for the volume of theconnecting rod 26 will pass in from they reservoir 21 through the reliefport34. This ywill allow the body 1 of the scraper to tilt backward intoa hauling position, such as shown in Fig. 3. When the, scraper -isdumped the above described action will again take place.

Referring to Fig. 4, asa means of securing adjustment ofthe apparatus tothe desired digging angle, I provide in cylinder 22 a number of outlets43, 44, 45 and 46 placed at various pointson rear end of the cylinderand connected withJoutlets-47 or 48 on the forward end of the cylinder.Note that near the outlets 48, 44, 45 `and 46 are placed cocks 49, 50,51 and v52. Now if say cock 49 is opened and all others closed it isevidentrthat the piston after being pushed to the forward end of thecylinder can return part way when the scraper is returned to the loadingposition. N ow, if coclr49V is closedand any one of theothers openedthepiston would travel back tov the corresponding position, thusadjusting-the digging position of the scraper accordingly.

52i-provide a control which Ywill automatically return thescraper toanyone ofthe several desired angles without attention of the tractoroperator. Also vthe tractor driver can secure an infinite number ofdigging poto the rear of the scraper, and extending above the top of thescraper, a bracket mounted on the tongue of the scraper, hydraulicapparatus vpivotally connected to said bracket, saidhydraulicapparatusincluding a connectinc, rod having spaced plates attached toit,

a movable Vpiece nriountedy between the plates and having a limitedrange of movement, saidpiece havingprojections pivotally engaging theupper ends of the posts aiiixed to the rear of the scraper, and meansfor controlling the operation ofth e hydraulic apparatus from adistance, whereby the digging angle may be controlled from a distanceand whereby the machine will automatically be placed in such a positionthat the loading operation may be commenced at onceV whenever thescraper is returnedfrom a dumping position to a digging position withoutattention on the part of the tractor operator.

2. In apparatus of the class described, the combination of ascrapenpulling rods pivotally connected with the forward end of thescraper, a tongue on the scraper, a slide member slidably `mounted onthe tongue and to which member the pulling rods are operativelyconnected, means operable at a distance for releasing the slide member,posts atiixed to the rear of the scraper, and extending above the top ofthe scraper, a bracket mounted on the tongue of the scraper, hydraulicapparatuspivotally connected to said bracket and having an operativeconnection with the upper -ends of the posts-to limit the angle to whichthe scraper can be returned from dumping position.

3. In hydraulic apparatus Yfor* tilting a Scraper to a desired diggingangle, thecombination of a scraper body. posts affixed to the rear ofthe scraper, and extending above the top of the scraper, a' tonguehaving a limited slidable connection with said posts at a point abovethe scraper but below the upper ends'of the posts,l hydraulic apparatusfor limiting the angle to which the scraper can be `returned fromdumping position. means for operatively connecting the hydraulic vparatus with the upper ends of the posts, a piston to which said meansare attached, a main cylinder in which the'piston is slidably mounted,an auxiliary cylinder with which the main auxiliary cylinder has a fluidconnection, vconduits opening out'of opposite ends of the main cylinder,an encircling' pipe with which each of said conduits communicate, checkvalves in said pipe, and .means fined in claim 6, the combination of anoperfor manually operating one of the valves.`

il. In hydraulic apparatus for controlling a scraper, the combination ofa scraper body, posts aiii-Xed to the rear of the scraper and eX.-tending above the top of th-e scraper, a tongue having a limitedsllidable connection With said posts at a point-between` the top of thescraper and the upper ends of the posts, hydraulic apparatus forvcontrolling the digging angle of the scraper body', a link membeioperatively connecting said hydraulic apparatus with the upper ends ofthe posts, said apparatus including a piston to which said' link memberis attached, a main cylinder in which the piston is slid'ably mounted,an auxiliary cylinder, a fluid connection between the main cylinder andthe auxiliary cylinder, conduits opening out of opposite ends of themain cylinder, an encircling pipe 'With which each of said conduitscommunicates, check.`

valves in said pipe, and valve mechanism for controlling the operationoi" theVv abovef'described hydraulic apparatus, said mechanisin beingoperable froma distance.

5. In combination With the apparatusv de.- fined in claim 3 a reliefIvalve mounted inthe pipe which encircles the cylinderr 4 l 6. In anapparatus of the class described,

v the combinati-on `of a scraperV body, posts aflined to the rearof :thescraperbody and extending substantially above the topof the scraperbody, a draft device having a slid'- able and pivotal connection Withthe said t posts at a point spaced substantially fromthe top of theposts, a hydraulic control `alpparatus including a piston, connectingrod, and spaced plates attached to the connecting rod, a movable piecemounted `between said spaced plates and having a pivotal connection withthe top of the aforesaidposts, valve mechanism. connected `with thehydraulic apparatus and operable from a distance.

7. In an apparatus of theclass described,

the combination of av scraper body; posts aliixed to the rear of thescraper body lsaid postsl extending substantially above the top of thescraper body i a draft device having a slidable and pivotal connectionWith-the said posts at a point spaced frointhe topportion thereof; ahydraulic control apparatus including apiston, connecting rod, andspaced plates attached Yto the connecting rod; l a

movable plate mounted between said spaced@` plates and having a pivotalconnection vwithl the top of the aforesaid posts, valve mecha'-,

nisin connected with they hydraulic appara-tus` and operable from adistance forv controlling` the operation of the hydraulic apparatusto;Lregulate the digging angle of the scraper, an Y operating lever mountedonfthe' draft device and operable from a distance, a slide` member.releasable by said lever, pulling rodsicon.-

nected with said slider member and vvilthlftheAir bottoni forwardportion ofthe scraper. f

8'. In combinationwith theapparatus ydeating" lever vmounted on thetongue of the scraper and operable from a distance,v a slide memberreleasa-ble by said lever, pulling rods connected .with said member andWith the bottom forward portionof the scraper. 1

9;, In an apparatus of theclass described,-

the combination of ya scraper body, posts aflixed to the rearv of thescraper and extending considerably above the top of the scraper, atongue connected with said posts'and also Witli the forward portionofthelbody'of the scraper for tilting the scraper, and a hydraulicapparatus operatively mounted on the tongue and operatively connectedwith the upper ends of the fposts and means oper- 'able from fa.distance for-controlling the hydraulic apparatusy whereby to regulate Vand control: the operative 'position of the scraper` and its diggingangle.

10.V In'an apparatusiof the class described,

the'coinbination ofascraper body,posts affixed tothe rear of the scraperyandfertending considerably above the top. of thev scraper, a tongueconnected With said posts and also with the forward portion of the bodyofthe scraper for tilting Vthe scraper, and a hydraulicV apparatusoperatively mounted on the tongue and operatively .connected with theupper ends of theposts, the hydraulic apparatus-being arrangedandladapted for Yautomatically and positively controlling' the extendingabove same and to which the 'hydraulic apparatus is connected saidhydraulic apparatus including means for automatically regulatingv and'limiting the return movement from digging lposition of the body of theapparatus to its lhauling position'ivith-l out the attention of theoperator.

l2. In apparatus of the class described,

the combination of a tongue, a hydraulic control unit mounted onthetongue, posts a'ixed to the scraper body andk extendingl above same andtovvhichthe hydraulic apparatus jis'connected said hydraulicapparatu'sin:

cluding means for automatically limitingtlie return-'movement of theapparatus from-digging to hauling position Without the attention ofthe]operator, saidfhydraulic control unit includingpipes having by-pass`adj ustment cocks arranged to automaticallyY return the scrapertoany oneofseveral desired` angles Without attent-ion ofthe tractor operator,and' cords connecting With operating f levers whereby the tractor drivercan control-the apparatus from a distance andsecure an infinite numberof digging positions by operating the cords.

13. In an apparatus of the character described, vthe combination with ascraper body7 of apost arranged adjacent the'rear of said Sora-per, adraft device connected with said post and with the forward portion Vofthe scraper for tilting the scraper, a hydraulic apparatus mounted onthe draft device and operatively connected with the post, and means tocontrol the hydraulic apparatus to regulate the operative ydigging angleof the scraper.v i

Y lit. In ari-apparatus of the character described, the combination witha scraper body,

Y of a draft deviceconnected with the scraper body adjacent the rearthereof,.means connecting the draft-devicevwith the forward portion ofthe scraper, hydraulic apparatus mounted on the draft device andoperatively connected to the scraper body, and-means to control'thehydraulic apparatus for regulating' the operative diggingiangle ofthescraper.

15. Inan. apparatus of the character kdescribed, the combination with ascraper body, of a draft device connected with the scraper body adjacentthe rear thereof, means connecting the ldraft device with the forwardportion of the scraper body, hydraulic apparatus arranged to allowrelative movement between the dra-ft device and scraper body, and meanstocontrol the hydraulic apparatus for regulating the operative diggingangle of the scraper.

16. In an apparatus of the character described, the combination with ascraper body, of a draft device operatively connected to said scraperbody at points spaced longitudinally of the draft device, one of theconnections between the scraperbody and draft deice permitting movementof the scraper body relative to the draft device, andhydraulic apparatusarranged tov adjustably limit said relativeV movement. i f 17. In anapparatus of the characterdescribed, the combination with a scraperbody, of al draft device'operativelyv connected to Y said scraper body,saidconnection permitting limited sliding movement of the scraper bodyrelative to the draft device, and a hydraulic apparatus associated withsaid sliding con- K nection to regulate and limit the movement ofthescraper body relative to'said draft device. Y v Y.

18. In an apparatus ofthe character d escribed, thecombination with ascraper body,

of a dra-ft device operatively connected there- Y with',.said draftconnection permitting rela- .'tive movement between the ldraft deviceand Vthe scraper body, and a hydraulic apparatus associated with saiddraftconnection to automaticallyV limit relative movement between thescraper body and draft device.

V19. In an apparatus of the character described, the combination with ascraper body, of a draft device operatively connected therewith, saiddraft connection permitting relative movement between the scraper bodyand draft device, and a hydraulic apparatus associated with said draftconnection to regulate and limit relative movement between the scraperbody and draft device, said hydraulic apparatuscomprising a hydrauliccylinder, a piston arranged therein, conduits connected with oppositeends of said cylinder, a conu trol valve operatively associated withsaid conduits to permit movement of the piston in' said cylinder, andmeans to permit limited movement'of the piston in the cylinderindependently of the control valve.

20. In an apparatus of the character described, the combination with ascraper body of a draft device operatively connected therewith,saiddraft connection permitting relative. movement between the scraperbody and draft device, and a hydraulic apparatus associated with saiddraft connection to regulate and limit relative movement between thescraper body and draft device, said hydraulic apparatus vcomprising apiston and a hydraulic cylinder therefor, said pistonV and cylinderbeing connected to said scraper body and draft device, conduitsconnected with opposite ends of the hydraulic cylinder, a control valveoperatively associated with said conduits topermit movement of thepiston in said cylinder, anda plurality of spaced relief valvesassociated with said cylinder to permit limited movement of the pistonin the cylinder independently of the control valve.

2l. In anY apparatus of the class described, the combination with ascraper body, of a post connected to said scraper body adjacent the rearthereof and extending thereabove, a draft device having' a slidingconnection with said post, a bracket on said draft device, a hydrauliccylinder secured to said bracket, a piston arranged in said cylinder andpivotally connected to said post, and fluid conduits connected with saidcylinder.

22. In an apparatus of the character described, the combination with ascraper body, of a post extending thereabove adjacent the rear thereof,a draft device slidably connected withsaid post at apoint spaced fromits top, a hydraulic apparatus connecting the draft device with the postat ai point spaced above thev slidable connection for limiting slidingmovement between the draft device andthe scraper body, and a releasableconnection between the front of the scraper .body and lthe draft device.y

23. In an apparatus of the character described, the combination withV avscraper member, of a draft member having a sliding connection with thescrapermember, a hy-F draulic cylinder connected to one of said members,a piston arranged inA saidcylinder and connected to the other of saidmembers,

and means to limit the movement ofthe piston in the cylinder to limitrelative movement between the scraper and draft device.

24. In an apparatusof thecharacter described, the combination with ascraperbody,

of a draft device operatively connected tothc scraper body adjacent theforward end thereof, and hydraulic apparatus lconnecting `the draftdevice with the rearward portion ofr the scraper body and arranged toallow relative movement between the scraper body an draft device. f

25. In an apparatus of the character described, the combination with ascraper body, of a draft device operatively associatedwith the frontportion of the scraper body, an upstanding member secured to the scraperbody adjacent the rear thereof, and a hydraulic apparatus connecting theupstanding member with the draft device and adapted to allow relativemovement between the draft device and scraper body.

26. In an apparatus Yof the 'character described, the combination withascraper box, j

of a draft device operatively connected with the forward portion of thescraper box, and a hydraulic apparatus operatively connecting the draftdevice with they scraper box and arranged to allow relativemovement beiftween the scraper box and draftV device duri ing the digging, haulingand dumping operations of the scraper box.

27 In an apparatus of the character described, the combination with ascraper box, of a draft device pivotally connected to the forwardportion thereof, and a hydraulic apparatus operatively connecting thedraft device withthe scraper box and arranged to allow relative movementbetween the scraper box and draft device during lthe digging, .Y

hauling and dumping operations of the scraper box.

28. In an apparatus of the character described, the combination with ascraper body, of a draft device pivotally connected to the forwardportion of the scraper body, a hydraulic cylinder pivotally connected tothe draft device, and a piston arrangedjin said cylinder and pivotallyconnected adjacent the rear of said scraper body toy allow relativemovement between the scraper body and draft device.

MCLENNEN c. sLArE.

